Observation of hydrogen induced intermediate borides in PrFeB based alloys by Mössbauer effect spectroscopy

  • Saccone F
  • Torres C
  • Sánchez F
 et al. 
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Abstract

In the present work, a quantitative analysis of the phase compositions by Mössbauer effect spectroscopy of solid and conventional hydrogen disproportionated Pr13.7Fe80.3B6.0and Pr13.7Fe63.5Co16.7Zr0.1B6.0alloys was carried out. Significant amounts of intermediate borides t-Fe3B and Pr(Fe,Co)12B6were detected after solid hydrogen disproportionation treatment in Pr13.7Fe80.3B6.0and Pr13.7Fe63.5Co16.7Zr0.1B6.0alloys, respectively. After conventional hydrogenation-disproportionation-desorption-recombination treatment these phases were not detected and in no case residual Pr2Fe14B-phase was found. It was observed that the amount of intermediate borides after disproportionation can be correlated with the degree of texture after recombination at various temperatures. © 2002 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • HDDR process
  • Magnetic anisotropy
  • PrFeB hard magnets

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